International texts are not being received?

[TheFlem]

Hello folks

I have an iPhone 5.

I can make and receive local and international calls. I can send and receive local text messages. I can receive international text messages but cannot send them. I have an International calling and texting plan.

iMessage works fine as does Viber. I have been in contact with Verizon and have been told everything is working fine. They say my text messages are being sent. But none of my international contacts receive them. My international contacts have service providers that are on the Verizon list and they all can receive international texts.

I also contacted Apple and they said the problem was with Verizon as the phone works fine.

Does anyone else have this or a similar issue? It's very frustrating.

Any assistance would be greatly appreciated.

Many thanks